61 lines
1.8 KiB
C#
61 lines
1.8 KiB
C#
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using LibraryContracts.BusinessLogicsContracts;
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using LibraryContracts.StorageContracts;
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using LibraryContracts.BindingModels;
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using LibraryContracts.ViewModels;
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namespace LibraryBusinessLogic.BusinessLogics
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{
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public class BookLogic : IBookLogic
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{
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private readonly IBookStorage _bookStorage;
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public BookLogic(IBookStorage bookStorage)
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{
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_bookStorage = bookStorage;
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}
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public List<BookViewModel> Read(BookBindingModel model)
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{
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if (model == null)
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{
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return _bookStorage.GetFullList();
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}
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if (model.Id.HasValue)
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{
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return new List<BookViewModel> { _bookStorage.GetElement(model) };
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}
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return _bookStorage.GetFilteredList(model);
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}
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public void CreateOrUpdate(BookBindingModel model)
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{
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var element = _bookStorage.GetElement(
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new BookBindingModel
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{
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Title = model.Title
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});
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if (element != null && element.Id != model.Id)
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{
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throw new Exception("Книга с таким названием уже существует");
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}
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if (model.Id.HasValue)
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{
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_bookStorage.Update(model);
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}
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else
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{
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_bookStorage.Insert(model);
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}
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}
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public void Delete(BookBindingModel model)
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{
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var element = _bookStorage.GetElement(new BookBindingModel { Id = model.Id });
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if (element == null)
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{
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throw new Exception("Книга не найдена");
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}
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_bookStorage.Delete(model);
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}
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}
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}
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